If you want a chainwhip there are many available, and this one will do the job of removing your cassette nicely.
It's well made and easy to use, with a generous chain that worked without incident on every freehub that I tried. The handle's comfortable enough too. At £15 it's a tenner cheaper then Park's professional quality offering - and the Cyclus chain tool, with its similar level of build quality, is cheaper but has a much shorter chain, so this is a good value buy.
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